Much like g-Space (the FireFox plug-in), this is an email-based friend-to-friend (private p2p) file store... I don't know whether it handles versioning. It runs independently of the browser & user interaction.
http://easta.sourceforge.net/
Looks as tho the project is dead for 2+ years...
Anyone know of any other p2p/f2f email-based file stores?
Thanks
/lee